1172 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
Arabella attenuata, new species. 
Length, 90 mm. Width, without parapodia, 2.5 mm. Color in alcohol, pale yellow. 
Head (fig. 62) oval lanceolate, about as long as first 2 somites. Eyes, two pairs, brown, the inner 
larger and more prominent than outer. Mandibles jet black except at their 
anterior ends, which are light brown, united for about two-fifths of their length, 
tapering gently to blunt point posteriorly. Right maxillae with 4-toothed plates, 
increasing in size from before backward; first with 4 equal teeth, second with 5 
teeth, increasing in size from before backward, third with 4 or 5 much larger 
teeth than occur in either of the others, fifth with 6 or 8 prominent teeth. The 
left maxillary plates were too badly broken to be described. A long, narrow, 
light-brown chitinous rod terminates the maxillae posteriorly. 
Parapodium of tenth foot with rudimentary cirri, with posterior lobe large, 
blunt, extending upward and backward. A very broad, bluntly rounded acicu- 
lum extends to some distance from apex. Setae few in number, with broad curved 
end provided with a wing and tapering to an acute point. Minute serrations along 
wings near their basal portion. Near base of large setae are smaller ones, differ- 
ing from these mainly in size. Other parapodia essentially similar to the tenth. 
Collected at station 4551, vicinity of Monterey Bay, Cal. Type no. 5217, U. S'. National Museum, 
90 mm. long, 2.5 mm. broad. 
Genus NOTHRIA Johnston. 
Nothria macrobranchiata McIntosh. 
Nothria macrobranchiata McIntosh, Report Challenger Exp., vol. xii, p. 320, pi. xli, figs. 1, 2, 3, pi. xxii A, figs. 6, 7. 
Nortkia macrobranchiata Moore, Polychaela from the Coastal Slope of Japan and from Kamchatka, Proc. Acad. 
Nat. Sci. Philadelphia, vol. lv, June, 1903, p. 445. 
A number of specimens, mostly imperfect. McIntosh describes median tentacle as shorter than 
adjacent ones. In these specimens it was slightly longer. The left unpaired plate of the dental 
apparatus had 9 teeth in these specimens instead of 11, as figured by McIntosh. The branchiae were 
shorter and broader than those figured by McIntosh, though the difference may have arisen, as he 
says, because of a difference in the condition of the blood vessels. Branchiae in one specimen appear 
first on the ninth, in another on the tenth somite. In addition to setae described by McIntosh, there 
is a bundle of very small “brush-shaped” setae situated just dorsal to the base of the larger “dorsal 
setae.” 
As noted by Moore, branchiae extend to posterior end of body. No anal cirri were preserved in 
the single complete specimen of this collection. The tubes have the usual membranous foundation, 
and are thickly covered on the outside with small pebbles and bits of coral rock. 
Collected at station 4007, 508-557 fathoms, on bottom of gray sand and foraminifera; stations 4021 
and 4022, 286-399 fathoms, bottom of coral sand and foraminifera, and 4041, 382-253 fathoms, bn gray 
mud and foraminifera. 
Fig. 62.— Head of Ara- 
bella attenuata. new 
species, x 9. 
Genus MARPHYSA De Quatrefages. 
Marpbysa teretiuscula (Schmarda). 
Eunice teretiuscula Schmarda, Neue wirbellose Thiere, I, bd. ii, p. 129, taf. 32, fig. 259. 
These differ from Schmarda’s description in that the gills are 3 instead of 4 branched in their 
greatest development. 
Collected at Honolulu Reef. 
